Dental apparatus.



No. 709,973. mamszu.

DENTAL APPARATUS.

Patented Sept. 30; I902.

(Application filed Feb. 25, 1901.)

(No Model.)

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iINiTEn STATES PATENT OFFICE.

LUOIEN EILERTSEN, OF PARIS, FRANCE.

DENTAL APPARATUS.

SPECIFICATION formingpart of Letters Patent N 0. 709,973, datedSeptember 30, 1902.

Application filed February 25, 1901- Serial No. 48,681. (No model.)

T0 on whom it may concern:

Be it known that I, LUOIEN EILERTSEN, a citizen of the French Republic,and a resident of Paris, France, have invented certain new and usefulImprovements in Dental Apparatus, of which the following is aspecification.

This invention has relation to dental apparatus, and it relatesparticularly to means for retaining sets of false teeth in the month.

In some instances the springs heretofore employed for retaining sets offalse teeth in the month are objectionable both in mechanical andhygienic respects.

The object of the presentinvention is to prevent food from entering theinterior of the springs by introducing soft india-rubber into thesprings, and the surface thereof between the windings of the spring ismade antiseptic by immersing the spring thus filled with india-rubber ina solution of india-rubber containing antiseptic substances, or thespring is filled with antiseptic rubber.

In the accompanying drawings I have shown the means enabling the springsto'be removed as desired.

Figure 1 is a side view of aset of false teeth, showing a springconstructed and arranged in accordance with my invention. Figs. 2 and 3are two views of the spring. Fig. 4 is a view of a plate, partly insection, showing the securing-hook for the spring. Fig. 5 is a View of aplate, showing the same provided with the securing-hook only. Fig. 6shows the spring applicable to the fastening device shown in Fig. 5, andFig. 7 shows a plate provided with the rod 7.

In the drawings, 1 1 represent the ends of the spring 20, which ends aresecured to plates or buttons 2, to the centers of which are solderedrods 3, extending atright angles thereto. Each rod 3 extends freely intoa tube secured to the plate of the teeth as a substitute for theordinary nails. In order to prevent the rod from being disengagedfrom'the tube, I employ a smallhook 6, Fig. 4, resting on the plateto-which the rod 3 is soldered. Said plate is provided with a notch 5,Fig. 2, so that in order to introduce the rod into the correspondingtube said notch must be brought in front of the small hook projectingfrom the tube. Therefore there is but one position in which the rod' canenter the tube,

"and said position is determined so that the notch can never come infront of the hook whatever position the spring may occupy in the mouth.Therefore the spring cannot be detached in operation. I may dispensewith the tube and employ simply a pivot 7, terminating in a hook 6, asseen in Fig. 5.

As already described, a small plate 2 is secured to the ends 1 of thesprings; butin the modified form said plate is provided with a hole 8and a notch 5. There is but one position in which the spring may bedetached and attached. To this end the hole 8 must be fitted over thesmall hook 6. When the hole 8 has been engaged by hook 6, as justdescribed, the plate 2 is but slightly turned. It will be impossible forthe same to be disengaged unless the notch 5 is brought in front of thesmall hook 6. Thereforethis modified construction involves the sameprinciple as the construction first described, except that the tube isomitted and replaced by a pivot 7, Fig. 5, terminating in a hook tomaintain the center of the plate 2. In either case the arrangement canonly be disengaged in one position when the notch is in front of thesmall hook. The end of the small hook may be .free or connected to a rod9, parallel to the rod 7, Fig. 7, thus forming a bridge, under whichturns the plate 2 for the purpose of maintaining the hook 6. Said hookmay be made of any suitable form, provided that the principle of thesystem is not changed.

In order to prevent food from entering the interior of the spring, softindia-rubber is introduced into the same, and the surface between thewindings of the spring is made antiseptic by immersing the spring thusfilled withindia-rubber in asolution of indie-rubber containingantiseptic substances,or the spring is filled with antiseptic rubber.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1s-

1. The combination with the two dentureplates and securing-hooks securedthereto, of a coiled spring, and small disks secured to the ends of thespring and provided with notches in which the secu ring-hooks areadapted to engage.

2. The combination with the two dentureantiseptic soft rubber betweenthe windings IQ of the spring.

In testimony whereof I have hereunto set my hand in presence of twowitnesses.

LUCIEN EILERTSEN.

Witnesses:

ADOLPHE STURM, J. E. PILLON.

